﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using NPinyin;
using System.Text;

namespace Common
{
    public static class GetFirstPY
    {
        /// <summary>
        /// 判断是不是字符
        /// </summary>
        /// <param name="text"></param>
        /// <returns>真：是汉字；假：不是</returns>
        public static bool CheckStringChineseReg(string text)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(text, @"[\u4e00-\u9fbb]");
        }
        #region 取得一个汉字的拼音首字母
        /// <summary>
        /// 取得一个汉字的拼音首字母
        /// </summary>
        /// <param name="cnChar">一个字符（一般是汉字）</param>
        /// <returns>拼音首字母</returns>
        public static string GetFirSpell(string cnChar)
        {
            byte[] arrCN = Encoding.Default.GetBytes(cnChar);
            if (arrCN.Length > 1)
            {
                int area = (short)arrCN[0];
                int pos = (short)arrCN[1];
                int code = (area << 8) + pos;
                int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };
                for (int i = 0; i < 26; i++)
                {
                    int max = 55290;
                    if (i != 25) max = areacode[i + 1];
                    if (areacode[i] <= code && code < max)
                    {
                        return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
                    }
                }
                return "*";
            }
            else return cnChar;
        }
        #endregion

    }
}